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| author | Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2020-05-14 16:47:30 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:11:04 +1000 |
| commit | a18b834625d345bfa89c4e2754dd6cbb0133c4d7 (patch) | |
| tree | 80c5494fb0f98774387917839c1654e649a929d5 /arch/powerpc/kernel/dawr.c | |
| parent | 45093b382e0ac25c206b4dcd210c6be1f5e56e60 (diff) | |
| download | linux-a18b834625d345bfa89c4e2754dd6cbb0133c4d7.tar.gz | |
powerpc/watchpoint: Provide DAWR number to set_dawr
Introduce new parameter 'nr' to set_dawr() which indicates which DAWR
should be programed.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-6-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/dawr.c')
| -rw-r--r-- | arch/powerpc/kernel/dawr.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c index e91b613bf137..8114ad3a8574 100644 --- a/arch/powerpc/kernel/dawr.c +++ b/arch/powerpc/kernel/dawr.c @@ -16,7 +16,7 @@ bool dawr_force_enable; EXPORT_SYMBOL_GPL(dawr_force_enable); -int set_dawr(struct arch_hw_breakpoint *brk) +int set_dawr(int nr, struct arch_hw_breakpoint *brk) { unsigned long dawr, dawrx, mrd; @@ -39,15 +39,20 @@ int set_dawr(struct arch_hw_breakpoint *brk) if (ppc_md.set_dawr) return ppc_md.set_dawr(dawr, dawrx); - mtspr(SPRN_DAWR0, dawr); - mtspr(SPRN_DAWRX0, dawrx); + if (nr == 0) { + mtspr(SPRN_DAWR0, dawr); + mtspr(SPRN_DAWRX0, dawrx); + } else { + mtspr(SPRN_DAWR1, dawr); + mtspr(SPRN_DAWRX1, dawrx); + } return 0; } static void set_dawr_cb(void *info) { - set_dawr(info); + set_dawr(0, info); } static ssize_t dawr_write_file_bool(struct file *file, @@ -60,7 +65,7 @@ static ssize_t dawr_write_file_bool(struct file *file, /* Send error to user if they hypervisor won't allow us to write DAWR */ if (!dawr_force_enable && firmware_has_feature(FW_FEATURE_LPAR) && - set_dawr(&null_brk) != H_SUCCESS) + set_dawr(0, &null_brk) != H_SUCCESS) return -ENODEV; rc = debugfs_write_file_bool(file, user_buf, count, ppos); |